How to access iterator value in tLoop?

When iterating using tLoop, is it possible to access the current value of the iterator from the downstream component? If so, how would I go about doing that? I am looking to do a crude unpivot using tFLowToIterate, tLoop and tFixedFlowInput, but I would like to retrieve columns that are named using integers (e.g., column_1, column_2) from the globalMap in tFixedFlowInput.Essentially, I would like to provide a mapping in the tFixedFlowInput that looks like:(Integer) globalMap.get("column_" + currentLoopValue.toString())